Electrical apparatus



June 20, 1933. H. v. NYE

ELECTRICAL APPARATUS Filed Oct. 5, 1929 2 Sheets-Sheet 1 I ----H F Q/W M June 20, 1933. v NYE 1,914,670

ELECTRICAL APPARATUS Filed Oct. 3, 1929 2 Sheets-Sheet 2 Patented June 20, 1933 UNITED STATES PATENT OFFICE HENRY V. NYE, OF WEST ALLIS, WISCONSIN, ASSIGNOR TO ALLIS-CHALMERS MANU- FACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF DELA- WARE ELECTRICAL APPARATUS Application. filed October 3, 1929. Serial No. 396,983.

This invention relates in general to encased electrical apparatus and more particularly to encased electrical apparatus immersed 111 insulating fluid hereinafter referred to as oil other portions of the encased apparatus, and

more particularly without disturbing the easing of said other portions of the apparatus. Another object is the provision of a construction embodying the hereinbefore menlioned features while at the same time permitting removal of the aforesaid apparatus along with its casings as a whole.

More specifically, it is an ob ect to prov de an encased transformer and fuse construct1on in which the fuse may be removed without disturbing the transformer or other parts of the apparatus. It is a further object to pro vide means which will render safe the removal of the fuse.

It is a still further object to provide a construction in which parts of apparatus contained in the same general casing and immersed in oil may be removed without draining oil immersing other parts of the apparatus.

Still another object is the provision of a construction whereby a fuse may be readily removed and replaced. Other objects will appear hereinafter as the description of the invention proceeds.

The novel features of the invention will appear from this specification and the accompanying drawings forming a part thereof and disclosing one embodiment of said invention and all these novel features are intended to be pointed out in the claims.

In the drawings:

Fig. 1 is a sideelevation of a construction embodying the invention a part being broken away.

Fig. 2 is an end elevation with certain parts shown which are omitted in Fig. 1 for the sake of clearness.

Fig. 3 is an enlarged detail view with parts potential type.

shown in Fig. 1, looking in a direction opposite from that in Fig. 1; and

Fig. 4: is a fragmentary detail plan View of a part of Fig. 3.

Referring to Fig. 1 the entire apparatus is supported by a stationary support 1 which may itself be sustained by any suitable means such as standards (not shown). Suspended from and beneath the support 1 is a casing or tank 2. The tank 2 may be fastened to the support 1 by means of bolts (as indicated for example in Fig. 3) or any other suitable means. The tank 2 is adapted to contain a transformer 3 which in this instance is of The tank 2 also has within its general confines a fuse 4 which is c011- nected at one terminal to the transformer 3 and at the other end to a terminal carried by an insulator 5, as will more fully appear hereinafter. A conductor passing through the insulator 5 has connected at its upper terminal one end of a resistor 6 the other end of which is connected to the terminal of a conductor passing through an insulator 7. The insulators 5 and 7 are carried by the sup port 1.

The insulator 7 projects downwardly into a casing or tank 8 adapted to contain a switch the movable member 9 of which. is here shown as pivoted to the lower end of a conductor passing through the insulator 7. The switch member 9 1's adapted to contact with a stationary switch terminal carried by a conductor passin through an insulator 10, the latter being aiso carried by the support 1'. The insulator 10 has its upper end enclosed by a housing 11. The housing 11 may have connected thereto a pipe or conduit through which. an electrical line conductor is adapted to pass and make connection to the upper terminal of the conductor passing through insulator 10. The switch member 9 is also adapted to make contact with a grounded contact 12.

The switch 9 may be operated by means of a link 13 connected to a rod 1 1 which may be reciprocated through suitable bell crank levers by means of a rod 15 in turn connected 7 to a handle lever 16 having a pivot 17. The 59 in section, of a portion of the apparatus p1vot17 is here shown as carried by a casing CIT 18 also suspended from the support 1. The casing 18 contains apparatus which need not be described in connection with the present invention.

The switch operating rod is iere shown as having pivoted thereto a link 19 the other end of which is pivoted to one element of a bell crank lever 20. The other end oi the bell crank lever 20 is adapted to reciprocate a belt 22 adapted to pass into a hole in a projection 23 carried by a door 24.

The door 2% is pivoted at 25 and is adapted to close an opening 26 (see Fig. 3) in a ring 27 which is fastened in any suitable manner to the tank 2. Concentric with the opening 26 is a flange 28 here shown as recntrant, that is, extending inwardly into the tank 2. The flange 28 may be formed as here shown by a portion of the bottom of tank 2.

The flange 28 serves to support and aline with the opening 26 an insulating member 29 of generally tubular form. The upper end of the member 29 is supported by a bra .ket 30 attached to the side walls of the tank 2. The insulating member 29 may be cemented to the bracket 30 and the flange 28.

The insulator 5 carries at its lower end a contact terminal 31 which is loosely mounted on a stud 33 electrically connected to or forming part of the conductor passing through the insulator 5. The contact 31 is here shown as spring pressed in a downward direction by means of a spring 32. the downward motion of contact 31 being limited in any suitable manner as by a cross pin through stud 33. One terminal 3-1 of the fuse 4 is adapted to make contact with the contact terminal 31, the other terminal of the fuse being seated on a carrier havin a socket 36 at the end thereof. The socket has inwardly turned flanges 61 adapted to grasp a shoulder on the i'use terminal as indicated. The socket 36 open at the side so that the fuse may be slid into the socket by a motion transverse to the axis of the socket. At the lower portion of the socket SS is a shank or stud 3'? forming part of the socket 36 or suitably connected thereto. The stud 37 is suitably connected to a handle 38 as by means of a ferrule The ferrule 39 has an enlarged upper portion adapted to make sliding contact with a tubular contact 49. The tubular contact 10 has axial slots communicating with circumterent-ial slots and these slots are adapted to receive pins 4-1, 42. forming in conjunction with the said slots a bayonet joint of well known form. The tubular contact 40 has tastenetl thereto a stud 43 which passes through the insulating member 29 and also through a countersunk terminal block 45, these parts being fastened togethc' and to the insulating member 29 by means of a nut it. Intel-posed between the tubular contact- 40 and the insulating member is a gasket which does not completely surround the tubular contact but leaves an opening, as indicated on the left-hand side of said contact, for the passage of oil. Leakage of oil from the tank 2- into the inside of the tubular member 29, in case said member is emptied of oil as hereinafter described, is preferably prevented by means at a cap screwed into the countersunk portion of the block The transformer 3 is here shown as having one high tension terminal connected by means of a conductor 4E6 to the terminal block 45, the other high tension terminal of the transformer connected by means of a conductor 47'to the tank 2 and therefore to ground. The low tension terminals 62 of the transformer (see Fig. 1) are brought out of the tank in any suitable manner.

The tank 2 is indicated as filled with oil to a level 48, which level may be indicated by means of a gage -19. The tubular member 29 is here indicated as filled with oil to a level 50, which level may be indicated by a gage 51 connected by means of a pipe 52 to a cap 53 suitably cemented to a nipple 54: formed on the member 29 as more clearly shown in Fig. 4.

In order that the tubular member 29 may be filled with oil a pipe 55 is provided suitably connected. and leading to and over the top of member 29. The pipe 05 parses through the tank 2 and is provided at its outer end with a filling connection 56.

For the purpose of draining the tank of oil a valve 57 may be provided. The member 29 may be independently drained of oil through a valve 58 connected to a pipe 59 screwed into an opening in the door 2%.

When it is desired to remove the fuse 4 the handle 16 must. first be operated since the door 24 cannot be opened until the bolt 24 is withdrawn. The ope ation of handle 16 opens the switch 9 so as to disconnect the high tension circuit including the fuse 4 and the transformer 3 and at the same time grounds this circuit through contact 12. hen the said operation has been performed the bolt 22 has also been withdrawn. The member 29 is now drained of oil. by opening valve 58 and the nuts holding the door 24 are removed, the door being then opened. The fuse 4 may now be withdrawn by means of the handle 38. It will be observed that in order to accomplish the removal of the fuse l it is unnecessary to drain the tank 2 of oil, the oil level therein remaining as before. Moreover it is unnecessary to disconnect the. tank 2 from and lower the same away from its support.

It will be evident from the foregoing that the tube 29 forms reentrant walls for the tank 2 serving to maintain the oil level 48 therein. lVhile in the illustrative construction shown the tube 29 may be regarded as an inward extension of the flange 28 it will be obvious that it is not essential that the flange 28 extend inwardly as it merely serves the purpose of supporting the reentrant walls formed bythe tube 29.

It is thus seen that the above described apparatus makes it possible for a workman to work on apparatus such as bushing 5, resistor 6, or contact 31 while casing 2 is removed, with out danger of receiving a shock therefrom by reason of the static potential that may otherwise be present on these elements when they are disconnected from the line and insulated from ground.

A new fuse may be placed in the socket 36 and brought to the position shown in Fig. 3

i by the handle 38. The door 2a is then again closed as is also the valve 58, and bolted in position. The member 29 may then be again filled with oil to the desired level as indicated by the gate 51, through the filling connection 56.

It should be understood that it is not desired to limit the invention to the exact details of construction shown and described, for obvious modifications may occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent:

1. In combination, a casing containing an insulating liquid, a removable fuse immersed in said liquid, switch means operable from an on position to a ground position to disconnect and ground said fuse, a door in said casing permitting removal of said fuse, means for preventing openingof said door when said switch is in said on position.

2. In combination, a casing containing electrical apparatus, said casing having a re entrant portion extending upwardly from the bottom of said casing, removable electrical apparatus in said reentrant portion connectible with the apparatus in said casing, and an openable oil-tight closure for said reentrant portion.

3. In combination, a casing containing electrical apparatus immersed in oil, said casin g having a reentrant portion extending upwardly from the bottom of said casing above the oil level in said casing, removable electrical apparatus in said reentrant portion connectible with the apparatus in said casing, and an openable oil-tight closure for said reentrant portion.

4. In combination, a casing containing electrical apparatus, said casing having a reentrant portion extending upwardly from the bottom of said casing, removable electrical apparatus in said reentrant portion connectible with the apparatus in said casing, an openable oil-tight closure for said reentrant portion, and means whereby said reentrant portion may befilled with oil from the exterior of said casing.

5. In combination, a casing containing electrical apparatus, said casing having a reentrant portion extending upwardly from the bottom of said casing, an insulating bushing in the cover of said casing, a conductor passing through said bushing, said conductor having a terminal in alinement with said reentrant portion, a conductor extending from said electrical apparatus through a wall of said reentrant portion and having a terminal therein, and a removable fuse having terminals in contact with said aforementioned terminals.

6. In combination, a casing containing electrical apparatus immersed in oil, said casing having a reentrant portion extending upwardly from the bottom of said casing above the level of the oil in said casing, an insulating bushing in the cover of said casing, a conductor passing through said bushing, said conductor having a terminal in alinement with said reentrant portion, a conductor extending from said electrical apparatus through a wall of said reentrant portion and having a terminal therein, and a removable fuse having terminals in contact with said aforementioned terminals.

7.111 combination, a casing containing electrical appartus immersed in oil, said casing having a reentrant portion extending upwardly from the bottom of said casing above the level of the oil in said casing, an insulating bushing in the cover of said casing extending into said reentrant portion, a conductor passing through said bushing, said conductor having a terminal at the lower end of said bushing, a conductor extending from said electrical apparatus through a Wall of said reentrant portion and having a terminal therein, and a removable fuse having terminals in contact with said aforementioned terminals.

8. In combination, a casing containing electrical apparatus, said casing having a reentrant portion extending upwardly from the bottom of said casing, an insulating bushing in the cover of said casing, a conductor passing through said bushing, said conductor having a terminal in alinement with said reentrant portion, a conductor extending from said electrical apparatus through a wall of said reentrant portion and having a terminal therein, a removable fuse having terminals in contact with said aforementioned terminals, and an openable oil-tight closure for said reentrant. portion.

9. In combination, a casing containing electrical apparatus immersed in oil, said casing having a reentrant portion extending upwardly from the bottom of said casing above the level of the oil in said casing, an insulating b ushingin the cover of said casing, a conductor passing through said bushing, said conductor having a terminal in alinement with said reentrant portion, a conductor extending from said electrical apparatus through a wall of said reentrant portion and having a terminal therein, a removable fuse having terminals in contact with said aforementioned terminals, and an openable oil-tight closure for said reentrant portion.

10. In combination, a casing containing electrical apparatus immersed in oil, said casing having a reentrant portion extending upwardly from the bot-tom of said casing above the level of the oil in said casing, an insulating bushing in the cover of said casing extending into said reentrant portion, a conductor passing through said bushing, said conductor having a terminal at the lower end of said bushing, a conductor extending from said electrical apparatus through a wall of said reentrant portion and having a terminal therein, a removable fuse having terminals in contact with said aforementioned terminals, and an openable oil-tight closure for said reentrant p ortion.

11. In combination, a metal casing containing electrical apparatus, said casing having a hole in the bottom thereof, a tubular insulating member making an oil-tight joint with the edge of said hole, said member extending upwardly in said casing, removable electrical apparatus in said member, and an openable oil-tight closure for said hole.

12. In combination, a metal casing containing electrical apparatus and having a hole in the bottom thereof, a tubular insulating member making an oil-tight joint with the edge of said hole, said member extending up wardly in said casing, an insulating bushing in the cover of said casing extending into said member, a conductor passing through said bushing and having a terminal at the lower end of said bushing, removable electrical apparatus having a terminal in contact with the first mentioned terminal, and an openable oil-tight closure for said hole.

13. In combination, a casing, a quantity of liquid within said casing, a removable fuse immersed in said liquid, a switch having a line contact, a ground contact, and a movable blade, a conductor extending from said fuse to said movable blade, switch operating mechanism operable to one position to move said blade into engagement with said line contact and operable to another position to move said blade into engagement with said ground contact, a door in said casing permitting removal of said fuse, and interlocking means actuated by said mechanism for preventing opening of said door when said mechanism is in said first mentioned position.

it. In combination, a casing containing electrical apparatus, a body of insulating fluid within said casing, a tubular casing attached to a wall of said first mentioned casing and surrounded by said insulating fluid, a second body of insulating fluid within said tubular casing independent of said first body of insulating fluid, contacts arranged within said tubular casing, a fusible cut-out device detachably connected to said contacts, a fluidtight door in said first mentioned casing providing access to the interior of said tubular casing, whereby said fusible cut-out device may be removed from said tubular casing without disturbing the insulating fluid in said first casing.

15. In combination, a casing containing electrical apparatus, a body of insulating liquid within said casing, an opened casing attached to a wall of said first mentioned casing and extending above the level of said liquid, a body of insulating liquid within said open-ended casing and having a level different from the level of said first mentioned body of liquid, contacts arranged within said openended casing, a fusible cut-out device detachably connected to said contacts, means for draining the liquid from said open-end ed casing without disturbing the liquid in said first mentioned casing, an openable door in said first mentioned casin g providing access to the interior of said open-ended easing, whereby said fusible cut-out device may be removed from said open-ended casing.

16. In combination, switchgear having a switch compartment and a fuse compartment each independently containing a body of insulating liquid, a fuse disconnecting switch in said switch compartment, means for operating said switch to a ground and to a closed position, a fuse detachably mounted. in said fuse compartment, an openable liquidtight door for the removal of said fuse, and interlocking means actuated by said switch operating means for permitting the opening of said door only when said switch is in said ground position.

17. In combination, switchgear having a switch compartment and a fuse compartment each containing insulating liquid, a removable fuse immersed in the liquid in said. fuse compartment, a switch immersed in the liquid in said switch compartment, said switch comprising a ground contact, a line contact and a movable contact connected with said fuse, switch operating means for causing said movable contact to selectively engage said line contact and said ground contact, an openable door in said fuse compartment for the removal of said fuse, and interlocking means actuated by said switch operating means for permitting the opening of said door only when said movable contact is in engagement with said ground contact.

In testimony whereof, the signature of the inventor is affixed hereto.

HENRY V. NYE. 

